#include"j.h"
void Init(st* ps)
{
	assert(ps);
	ps->a = NULL;
	ps->capacity = 0;
	ps->top = 0;
}
void Destory(st* ps)
{
	assert(ps);
	free(ps->a);
	ps->a = NULL;
	ps->capacity = ps -> top = 0;
}
void Push(st* ps, STDataType x)
{
	assert(ps);
	if (ps->top == ps->capacity)
	{
		int newCapacity = ps->capacity == 0 ? 4 : ps->capacity * 2;
		STDataType* tmp = (STDataType*)realloc(ps->a, sizeof(STDataType) * newCapacity);
	
	
	
		ps->a = tmp;
		ps->capacity = newCapacity;
	}
	ps->a[ps->top] = x;
	ps->top++;

}
void Pop(st* ps)
{
	assert(ps);
	assert(ps->top > 0);
	--ps->top;
}
STDataType Top(st* ps)
{
	assert(ps);
	assert(ps->top > 0);
	return ps->a[ps->top - 1];
}
int Size(st* ps)
{
	assert(ps);
	return ps->top;
}
bool Empty(st*ps)
{
	assert(ps);
	return ps->top == 0;



}